Counter Strike

CS is a very popular online gaming site. Recently a lot of users have
complained to the CS support staff that their login credentials have
been compromised and their "kills" have been "gifted" to other users.

As a result of these complaints, the CS admin has blocked the "gift" option.

The CS management has approached you to investigate the issue.

You are required to investigate and prepare a detailed report that
answers the following questions:

1. What are the vulnerabilities in the CS site that have been misused by hackers to compromise user credentials?